EP0030183A1 - Heizkörper für mit Gas beheizte Haushaltskessel in Warmwasser-Zentralheizungen - Google Patents

Heizkörper für mit Gas beheizte Haushaltskessel in Warmwasser-Zentralheizungen Download PDF

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Publication number
EP0030183A1
EP0030183A1 EP80401656A EP80401656A EP0030183A1 EP 0030183 A1 EP0030183 A1 EP 0030183A1 EP 80401656 A EP80401656 A EP 80401656A EP 80401656 A EP80401656 A EP 80401656A EP 0030183 A1 EP0030183 A1 EP 0030183A1
Authority
EP
European Patent Office
Prior art keywords
tubes
gas
angle
heating
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80401656A
Other languages
English (en)
French (fr)
Other versions
EP0030183B1 (de
Inventor
Guy Pompidor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0030183A1 publication Critical patent/EP0030183A1/de
Application granted granted Critical
Publication of EP0030183B1 publication Critical patent/EP0030183B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/403—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the water tubes being arranged in one or more circles around the burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular

Definitions

  • the present invention relates very particularly but not exclusively to domestic boilers for central heating with hot water by gas of the sealed type with forced draft. It relates to a new heat exchanger body which makes it possible to operate said boilers with partial or total recovery of the calories contained in the water vapor produced by the condensation of gas.
  • this water vapor is evacuated through the chimney in pure loss with the combustion products at a temperature generally between 110 ° and 250 ° C, this loss which is at least equal to the latent heat of condensation or vaporization of water vapor represents approximately 10% of the calorific value of the gas. To recover these lost calories, it is necessary to be able to condense this vapor, this is what is achieved in so-called condensing boilers.
  • the present invention makes it possible to avoid these drawbacks and aims to achieve a particularly simple and economical exchanger heater body for condensing boilers while creating a turbulence regime in the flow of combustion gases between the longitudinal tubes in view. to obtain higher convection heat exchange coefficients.
  • the invention relates to a heating body comprising a bundle of longitudinal tubes of elongated section arranged along the generatrix of a cylinder to form a cylindrical interior combustion chamber characterized in that the longitudinal median plane of each tubes is inclined at an angle relative to the radial direction of flow of the combustion gases in the combustion chamber to create an oblique attack of these gases on said tubes.
  • heat exchanger body 1 consisting of longitudinal tubes 10 of elongated section uniformly distributed along the generatrix of a cylinder so as to form a cylindrical interior chamber 2 for the introduction of a burner 3 also cylindrical.
  • These tubes 10 in which the fluid to be heated circulates are on the one hand parallel to each other and on the other hand inclined at an angle a with respect to a radial direction AB of flow of the combustion gases in a cylindrical combustion chamber 2.
  • the angle of inclination a of the tubes is defined by the angle between the longitudinal median plane A 1 B 1 of a tube and the radial plane AB passing through the intersection of the median plane A 1 B 1 of the tube and the upstream face of this tube in the direction of gas flow.
  • These angle of inclination to tubes 10 is for example close to 30 °. But we will use an angle of inclination of the tubes greater than a limit angle a- shown in Figure 2, and obtained when a radial plane AB 'passing through the axis of the cylindrical combustion chamber 2 and between two tubes 10 longitudinal neighbors is tangent to these two tubes.
  • This arrangement has many advantages. First of all, it makes it possible on the one hand to create a turbulence regime in the flow of gases between the tubes 10 despite the low value close to 50 to 200 of the Reynolds number characterizing this flow of gases in order to obtain high convection coefficients and on the other hand to increase the surface of the tubes exposed to the direct radiation of the flames of the combustion chamber, so as to constitute an "optically closed” heat exchange surface.
  • the term "optically closed surface” means that a light source having the axis of the combustion chamber and the cylindrical burner as its axis is not visible directly when looking at the exterior of this exchanger, therefore on the outlet side. combustion gases. We cannot therefore see in this case only indirect light traces emerging from the intervals between the tubes generated by the internal reflections and the diffusion of the central light source constituted by the flames of the burner.
  • this arrangement due to the oblique attack of the combustion gases on the tubes increases on the one hand the thermal power exchanged by convection by the turbulence created upstream of the tubes and consequently obtained between tubes and on the other hand the thermal power exchanged by radiation by exposing a larger area of the tubes to direct radiation from the gas combustion flames.
  • elongated water tubes has been envisaged, but it is likewise possible to use oval tubes with elliptical section or tubes with diamond section, or tubes with elongated section (oblong) with different contours on the face. upstream and the downstream face, such as tubes with a section known as an orange quarter shape, or a drop shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP80401656A 1979-11-30 1980-11-19 Heizkörper für mit Gas beheizte Haushaltskessel in Warmwasser-Zentralheizungen Expired EP0030183B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7929459A FR2487956A1 (fr) 1979-11-30 1979-11-30 Corps de chauffe pour chaudieres domestiques de chauffage central a eau chaude par le gaz
FR7929459 1979-11-30

Publications (2)

Publication Number Publication Date
EP0030183A1 true EP0030183A1 (de) 1981-06-10
EP0030183B1 EP0030183B1 (de) 1984-01-18

Family

ID=9232236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401656A Expired EP0030183B1 (de) 1979-11-30 1980-11-19 Heizkörper für mit Gas beheizte Haushaltskessel in Warmwasser-Zentralheizungen

Country Status (3)

Country Link
EP (1) EP0030183B1 (de)
DE (1) DE3066208D1 (de)
FR (1) FR2487956A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2154444A3 (de) * 2008-08-16 2012-06-06 Robert Bosch GmbH Wärmetauscher für ein Heizgerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1413466A (fr) * 1964-10-30 1965-10-08 Radiation Ltd Perfectionnements aux chambres de combustion pour chauffe-eau, et aux procédés de fabrication de ces chambres
DE1205681B (de) * 1963-05-24 1965-11-25 Max Boehm Warmwasserheizkessel
DE2100344A1 (de) * 1970-01-08 1971-07-15 Glow-Worm Ltd., Belper, Derby (Großbritannien) Wärmetauscher und unter Verwendung derartiger Wärmetauscher hergestellte Wassererhitzer
GB1578663A (en) * 1978-01-24 1980-11-05 Stelrad Group Ltd Boiler unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1205681B (de) * 1963-05-24 1965-11-25 Max Boehm Warmwasserheizkessel
FR1413466A (fr) * 1964-10-30 1965-10-08 Radiation Ltd Perfectionnements aux chambres de combustion pour chauffe-eau, et aux procédés de fabrication de ces chambres
DE2100344A1 (de) * 1970-01-08 1971-07-15 Glow-Worm Ltd., Belper, Derby (Großbritannien) Wärmetauscher und unter Verwendung derartiger Wärmetauscher hergestellte Wassererhitzer
GB1578663A (en) * 1978-01-24 1980-11-05 Stelrad Group Ltd Boiler unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2154444A3 (de) * 2008-08-16 2012-06-06 Robert Bosch GmbH Wärmetauscher für ein Heizgerät

Also Published As

Publication number Publication date
FR2487956A1 (fr) 1982-02-05
FR2487956B3 (de) 1982-07-23
EP0030183B1 (de) 1984-01-18
DE3066208D1 (en) 1984-02-23

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